JOURNAL of the Tunisian Chemical Society

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Structure cristalline et fragmentation par impact électronique du 7,8-dibromo-2,3-dihydro-2H-1,5-benzodioxépine

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The 7,8-dibromo-2,3-dihydro-2H-1,5-benzodioxepin (C9H8Br2O2) (I) was synthesized. This product was studied by electronic impact at 70 eV. Identification of different obtained ions permitted the proposal of a molecular fragmentation schema. The identification of halogenated acetylenic fragments from benzenic cycle was done. Its homologue bromonitrile (III) was synthesized and its impact electronic fragmentation was compared to that of (I). Crystal structure of (I) was determined. It crystallizes in the orthorhombic space group Pbca with a = 8.287 (2), b = 20.262 (3), c = 11.584 (3) Å, Z = 8 and V = 1944.9 (7) Å3, The molecules of (I) are in chair conformation and are connected by Vander Waals interactions.

F. Ammari, T. Ben Chaabane, F. Meganem

Heterocycle, Crystal structure, Mass spectrometry

Pages 295-303

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